Texas Instruments UCC28704EVM-724 Power Supply Evaluation Module
Texas Instruments UCC28704EVM-724 Power Supply Evaluation Module (EVM) demonstrates a low-cost solution to comply with global external power-supply efficiency standards. It helps users evaluate the UCC28704, an offline constant-voltage constant-current flyback controller. The evaluation module is a 10W offline isolated power supply providing 5V output on a USB-A port. The converter output voltage and current are regulated to 5% accuracy without an optocoupler or secondary-side feedback circuits. The Texas Instruments UCC28704EVM-724 demonstrates this low-cost solution without adding a secondary-side synchronous rectifier.
Features
- Universal AC input range (85V to 265V AC), 5V/2A isolated output
- 83% average efficiency and < 60mW standby power performance exceeds DoE Level VI and EU CoC V5 Tier-2 EPS standards
- 5% output voltage (CV) and current (CC) accuracy with primary-side regulation (PSR)
- 80mVp-p output voltage ripple at end of 0.15Ω cable
- Fault protections: output overvoltage, overcurrent, and load short circuit
Required Equipment
- Voltage Source
- Isolated AC source or variable AC transformer capable of 265VAC cable of handling 10W
- Voltmeter
- Digital voltage meter
- Power Analyzer
- Capable of measuring 1mW to 10W of input power and capable of handling 265V RMS input voltage
- Some power analyzers may require a precision shunt resistor for measuring input current to measure input power of 5W or less
- Read the power analyzer’s user manual for proper setup
- Oscilloscope
- 4 Channel 100MHz
- Probes capable of handling 600V
- Output Load
- Resistive or electronic load capable of handling 15W at 5V
- Recommended Wire Gauge (Insulated 22 AWG)
Test Setup
Inilathala: 2016-05-11
| Na-update: 2025-03-06